Most frou-frou is a phrase that refers to something that is overly intricate, decorative, or excessively fancy. Antonyms for this phrase could include simple, minimalistic, plain, understated, unadorned, unembellished, unostentatious and basic. These words describe an opposite approach to design, where less is more and the focus is on functionality, rather than aesthetics. While most frou-frou might appeal to some, others may prefer a more minimalistic approach that prioritizes practicality and efficiency. It's important to consider the context and purpose of the object in question before choosing an appropriate design style.